(Cairo, July 12, UPI)-suspects were seen fleeing in the Sinai desert peninsula in Egypt shortly after an explosion on a natural gas pipeline, witnesses said Tuesday.

Close to witness two vehicles see on the road in the desert after an explosion at the railway station inspection reports Egyptian news service al-Ahram Al-el-Arisch in the North of the peninsula, reported.

The explosion sent a fireball ripping through a pipeline used to export natural gas in Israel and Jordan.

The attack is the fourth, that the pipeline was sabotaged by Israel, because the revolution ended the Presidency of Hosni Mubarak earlier this year. Engineers had said that the damage caused by a July 4 explosion on the same pipeline almost fixed.

There were no claims of responsibility for the Tuesday attack.

The attack follows commitments between Paolo Scaroni, Chief Executive of the Italian energy group ENI, and Egyptian interim Prime Minister Essam Sharaf to activities in Egypt.

"The additional wells and speeding up the production of new discoveries, finds the new activities in the Western desert, the Mediterranean and in the Sinai and exploration and development, through the holes", said the energy company in a statement.

ENI said that investment in Egypt will be in the next year to about $3 billion.